Die forming swage



M. HEGYI DIE FORMING swAGE Aug. 19, 1969 2 Sheets-Sheet l Filed Nov. 24. 1967 FIGZ INVENTOR. Moses HEGYI ATTORNEY Aug- 19, 1969 M. HSG 3,461,114

' DIE FORMING SWAGE Filed Nov. 24, 1967 2 Sheets-Sheet 2 FIGB INVENTOR.

MOSES HEGYI ATTORNEY.

United States Patent O 3,461,714 DIE FORMING SWAGE Moses Hegyi, Orland Park, Ill., assignor to Borg- Warner Corporation, Chicago, lll., a corporation of Delaware v Filed Nov. 24, 1967, Ser. No. 685,614 Int. Cl. B21d 37/10; B21c 3/02 U.S. Cl. 72--416 6 Claims ABSTRACT OF THE DISCLOSURE A swage is disclosed herein that provides a structure whereby a piece part is supported on a die block in a die base and a punch is urged against the part to swage a tapered edge thereon.

Summary of the invention This invention relates to a die forming swage for providing a tapered cutting edge on a work piece part wherein a work piece part is positioned on a swage die block having an inclined work piece supporting surface with a swaging edge positioned substantially parallel with the edge of the work piece part to be tapered, and wherein a punch having a similarly tapered and concave working surface is adapted to move into engagement with said work piece part to swage a taper on the edge thereof along said die block swaging edge. The movement of the punch is acute with respect to the die block piece part supporting surface, and the cavity of the punch has one or more tapered edges whereby movement of the punch against the supported piece part will cause the metal on the edge of the piece part to move in two directions under deformation at an acute angle with respect to the punch surface contrary to the 90 movement of metal normally attendant in forging die operations.

The operation of this novel structure likewise thereby provides for a swaging operation which may take place in more than one direction, and yet require less force on the punch than is usually required in the normal forging situation where the metal to be forged by the die is moved at substantially a 90 angle with respect to the punch.

Other advantages and novel aspects of the invention will become apparent upon the following detailed description in conjunction with the accompanying drawing wherein:

FIG. l is a partial sectional View taken along a plane through the center of symmetry of the die forming swage disclosed herein showing the punch disengaged from the work piece part;

FIG. 2 is a partial sectional view taken along a plane through the center of symmetry of the die forming swage disclosed herein showing the punch in swaged engagement with the work piece part;

FIG. 3 is a side View of the punch looking from left to right in FIGS. l and 2 showing the tapered cavity for engaging and swaging the piece part;

FIG. 4 is a bottom View of the punch showing the tapered cavity for engaging and swaging the piece part; and

FIG. 5 is a top view of the swage die block and part locator members showing the interrelationship thereof.

A die forming swage generally designated by the numeral (FIGS. 1 and 2) is shown herein for the purpose of illustrating and describing this invention. The die forming swage 10 includes generally, among other things, a die base 11, a swage die block 12, a part locator 13, a punch backup member 14, a swage punch 15, a punch body 16 and a stripper guide 17. A piece part 18 is also illustrated in conjunction with the die forming swage to illustrate the operation thereof.

3,461,7 14 Patented Aug. 19, 1969 ICC The die base 11 is a fixed member and has the swage die block 12, part locator 13, punch back-up member 14 and stripper guide 17 mounted therein. In particular, the swage die block 12 (FIGS. l, 2 and 5) is seated on a re* cess surface 20 in the die base 11 and is retained in position by a bolt 21. The die block 12 is provided with a piece part supporting surface 22 which is at an acute angle with respect to the movement of the punch 15 shown by the arrows (FIGS. l and 2).

Also, the dieblock 12 is provided with a recess 23 (FIGS. l, 2 and 5) which facilitates access to the upper edge of the piece part 1S for manual or automatic insertion and removal of the piece part. The stripper guide 17 is positioned immediately below the swage punch 15 and is provided with concentric passages 27, 28 and 29. A stripper bolt 30 is positioned in the passages 27, 28 and 29 with a head 31 adapted to engage a shoulder 32, and with a shank 33 of the bolt 30 in sliding supported engagement with the passage 28, extending through passage 27 and threaded into an aperture 32 of the part locator 13. A compression spring 35 is provided between the part locator 13 and surface 36 at the bottom of the passage 27 to urge the bolt and the part locator 13 attached thereto upwardly towards the swage punch 15 away from a surface 37 of the stripper guide 17.

It should be noted that the part locator 13 is thus urged upwardly with respect to the swage die block 12 fixed to the die base 11 to strip the work piece part 18 from the die block 12 and provide work piece part locator surfaces 38 when the swage punch 15 is moved upwardly (FIGS. 1 and 5). Also, it should be noted that the part locator 13 is retained against lateral motion with respect to the die block 12 and the punch back-up member 14 by virtue of its engagement with surfaces 39 of the die block 12 and 40 of the punch back-up member 14 respectively.

The swage punch 15 is provided in two pieces 15a and 15b which are held together by bolts 45. The punch 15 has a cavity generally designated by the numeral 50 (FIGS. 1-4) which comprises a V-shaped tapered edge portion 51 that complements the sides 39 of the die block 12. The cavity 50 has a central portion 52 adapted to complement the surface of the piece part 18.

In the operation of the die forming swage of this invention, a work piece part 18 is placed on the die block work piece supporting surface 22 with the edges thereof in complemental engagement with surfaces 38 of the part locator 13.

It should be noted that a point 554 of the top corner edge of the work piece 18 (FIG. l) will engage the part locator 13 with the rest of the work piece part 18 relieved with respect thereto to allow the piece part 18 to flow laterally during forging of the edge thereof. The punch 15 is then forced downwardly placing the bottom surface thereof in engagement with the part locator 13 whereupon further downward movement thereof with the punch 15 causes the part locator 13 to move downwardly with the punch 15 and eventually away from its position adjacent the edge of the work piece part 18 (FIG. 2).

During the downward movement of the punch 1S, the cavity 50 of the punch is moved over the work piece 18 and the tapered surface 51 of the cavity will engage the top corner edge of the work piece 18 as shown at 55 and the metal of the work piece 18 along the top corner edge thereof will be caused to flow generally downwardly and to the right (FIG. 2) along with the inclined surface 51 to form a tapered surface 56 on the work piece part 18 and thereby provide a cutting cone edge thereon. It should be noted that the surface 56 is formed by forging the middle of the work piece 18 along a general path acute to the path of the punch 15 rather than perpendicular thereto in the general manner and thereby requiring a smaller punch force to provide the relatively large surface 56 than would normally be required.

Further, it should be noted that the punch 15 will engage the part locator 13 so that the upper surface of the part locator 13 will be spaced a slight distance from the outer edge of the punch 15 adjacent the cavity 5G thereof. This spacing permits any dashing from the work piece part 18 to pass over the part locator 13 and be secured by the tapered edge of the surface 51 of the punch 15 when it engages the edge 39 of the die block 12.

It is to be understood that the invention is not to be limited to the specific constructions and arrangements shown and described, as it will be understood to those skilled in the art that changes may be made without departing from the principles of the invention.

What is claimed is:

1. A die forming swage for providing a tapered cutting edge on a work piece part comprising a swage punch adapted to be urged along a given path, a swage die block having a work piece supporting surface and swinging edge in the path of said punch and acutely inclined thereto, a work piece part positioned on said support surface with an edge thereof adjacent the edge of said support surface, said punch having a concave Working surface with a tapered edge substantially parallel with said die block swaging edge and adapted to swage a taper on the edge of said work piece swaging edge, and means for urging said punch along the path thereof into swaging engagement with said work piece to swage a tapered cutting edge on said work piece.

2. A die forming swage as defined in claim 1 wherein a work piece part locator is provided in the path of said punch and which is normally biased toward said punch into position against the edge of said work piece part and adapted to move with said punch when engaged thereby to move from the normal lateral position to allow excess metal forged from said work piece to iiow thereover and be severed by said tapered punch surface and said die block swaging edge to deiine a cutting edge on said work piece.

3. A die forming swage as defined in claim 1 wherein said inclined swaging edge is V-shaped with the point thereof inclined away from said punch.

4. A die forming swage as defined in claim 2 wherein said inclined swaging edge is V-shaped with the point thereof inclined away frorn said punch.

5. A die forming swage as deined in claim 2 wherein said locator has one surface substantially parallel with said punch working surface and another surface adapted to engage said punch to cause said locator to move with said punch with the working surface thereof at a iixed distance with respect to said punch to allow swaged work piece metal to iiow thereover during movement of said locator with said punch.

6. A die forming swage as defined in claim 5 wherein said inclined swaging edge is V-shaped with the point thereof inclined away from said punch.

References Cited UNITED STATES PATENTS 169,213 10/1875 Watson 72-474 1,041,960 10/1912 Christenson 72-465 2,349,738 5/1944 Leleune 72-474 2,326,520 8/1943 Calhoun 72-412 3,016,600 l/1962 Schtzschock et al. 29-78 3,083,440 4/1963 Barbknecht et al. 29-14 3,089,352 5/1963 Chamouard 76--101 RICHARD I. HERBST, Primary Examiner U.S. Cl. XR. 

